<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>首页</title>
</head>
<body>
<h1>哈哈</h1>
<button id="dw" >点我</button>
</body>
<script src="/jquery.min.js"></script>
<script>
    $("#dw").click(function () {
        alert("你好，张磊！！！")

    })
</script>

</html>